Tubular electric resistance for air ducts are designed to dispense the heat through the air with the support of iron or stainless fins. the purpose is to as-semble resistance benches in the air passage, therefore when passing through the fins, hot air can be used for the specific purpose, as for example: air ducts for drying foods, seeds, clothes, paints in graphics, paints in packaging indus-tries and many other applications. Fined electric resistance cannot perform work without ventilation and immerse.